Democrats could potentially take as many as ten gubernatorial races in Tuesday's midterm elections, Marie Harf said Monday on Outnumbered.

Harf called the races "crucial" because they will determine the next congressional districts in many states after the 2020 redistricting.

"The 'Donald Trump Effect' on governor's races, I think, is very much an open question," she said. "We're not paying enough attention to them."

The Benson and Harf co-host also said she thinks President Trump is trying to make some of the midterm Senate races about him, even though his name isn't on the ballot.

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A new survey released on Monday found that the race for Florida governor is in a statistical tie between Rep. Ron DeSantis (R) and Andrew Gillum (D).

The NBC News/Marist survey revealed a 4-point margin between the candidates, as 50 percent of those polled favor Gillum, and 46 percent favor DeSantis.

Additionally, recent data from RealClearPolitics found that Gillum has a 3.2-point edge over DeSantis.

Harf noted how congressional Republicans want the president to amplify his message on the booming economy before Tuesday, and that his closing message might not help the GOP retain control of the House.

"Donald Trump is going all-in on a closing message of immigration," she said. "It's sort of a recap of his 2016 closing argument."

Watch more of the discussion from "Outnumbered" above.

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